package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.EmployeeNameExistException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
         DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));  //md5加密
        if (!password.equals(employee.getPassword())) {
            //密码错误
             throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    @Override
    public Result<String> save(EmployeeDTO dto) {

        //业务的健壮性判断
        Employee byUsername = employeeMapper.getByUsername(dto.getUsername());
         if (byUsername!=null){     //判断当前用户名不等于空时
              //自定义异常
             throw  new EmployeeNameExistException("用户"+dto.getName()+"已经存在了");


         }

        //1.创建employee对象

        Employee employee = new Employee();

        //2.将dto的属性值拷贝到employee对象中

        BeanUtils.copyProperties(dto,employee);

        //3.employee其他属性的初始化赋值
         employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes(StandardCharsets.UTF_8)));//将使用MD5加密后的初始化属性放进employee中

         employee.setStatus(1);

        // employee.setCreateTime(LocalDateTime.now());

         //employee.setUpdateTime(LocalDateTime.now());

         //employee.setCreateUser(BaseContext.getCurrentId());   //获得当前登录人的id

         //employee.setUpdateUser(BaseContext.getCurrentId());   //获得当前登录人的id

         //3.调用mapper插入到数据库

         employeeMapper.save(employee);


        return Result.success();
    }

    @Override
    public PageResult list(EmployeePageQueryDTO employeePageQueryDTO) {
       //分页
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //底层数组会进行分页
        Page<Employee> p = employeeMapper.list(employeePageQueryDTO.getName());


        return new PageResult(p.getTotal(),p.getResult()) ;
    }

    @Override
    public void update(Employee employee) {
      //补充基本属性
      //employee.setUpdateTime(LocalDateTime.now());
      //employee.setUpdateUser(BaseContext.getCurrentId());

      employeeMapper.update(employee);


    }



    @Override
    public Employee getById(int id) {



        return employeeMapper.getById(id);
    }

    @Override
    public Result<String> operate(Long id, Integer status) {
        employeeMapper.operate(id,status);
        return Result.success();
    }


}



